Authentication regression in latest release

[tntmod54321]

DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

• I understand that I will be blocked if I intentionally remove or skip any mandatory* field

Checklist

• I'm reporting a bug unrelated to a specific site
• I've verified that I'm running yt-dlp version 2023.06.21 (update instructions) or later (specify commit)
• I've checked that all provided URLs are playable in a browser with the same IP and same login details
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched known issues and the bugtracker for similar issues including closed ones. DO NOT post duplicates
• I've read the guidelines for opening an issue

Provide a description that is worded well enough to be understood

Hi, this latest release broke the soundcloud extractor for me (the previous release still works), I'm filing this as a generic bug because this error occurs in extractor/common, and could perhaps be present in other extractors, I hope that's forgivable.

Provide verbose output that clearly demonstrates the problem

• Run your yt-dlp command with -vU flag added (yt-dlp -vU <your command line>)
• If using API, add 'verbose': True to YoutubeDL params instead
• Copy the WHOLE output (starting with [debug] Command-line config) and insert it below

Complete Verbose Output

[debug] Command-line config: ['-vU', '-F', 'https://soundcloud.com/user-352956556/my-home-is-a-prison']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2023.06.21 [42f2d40b4] (pip)
[debug] Python 3.10.8 (CPython AMD64 64bit) - Windows-10-10.0.19044-SP0 (OpenSSL 1.1.1q  5 Jul 2022)
[debug] exe versions: ffmpeg 4.4-essentials_build-www.gyan.dev (setts), ffprobe 4.4-essentials_build-www.gyan.dev
[debug] Optional libraries: Cryptodome-3.15.0, brotli-1.0.9, certifi-2018.04.16, mutagen-1.46.0, sqlite3-2.6.0, websockets-10.4
[debug] Proxy map: {}
[debug] Loaded 1848 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Available version: stable@2023.06.21, Current version: stable@2023.06.21
yt-dlp is up to date (stable@2023.06.21)
ERROR: 'NoneType' object has no attribute 'format'
Traceback (most recent call last):
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\YoutubeDL.py", line 1555, in wrapper
    return func(self, *args, **kwargs)
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\YoutubeDL.py", line 1631, in __extract_info
    ie_result = ie.extract(url)
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\extractor\common.py", line 705, in extract
    self.initialize()
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\extractor\common.py", line 609, in initialize
    username, password = self._get_login_info()
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\extractor\common.py", line 1335, in _get_login_info
    username, password = self._get_netrc_login_info(netrc_machine)
  File "C:\Users\tntmo\AppData\Local\Programs\Python\Python310\lib\site-packages\yt_dlp\extractor\common.py", line 1300, in _get_netrc_login_info
    cmd = self.get_param('netrc_cmd', '').format(netrc_machine)
AttributeError: 'NoneType' object has no attribute 'format'

[tntmod54321]

I was right, yikes, twitch is also broken. edit: according to the above bot, odysee too.

[pukkandan]

#7367